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Does the processor push an error code onto the ring0 stack when #GP is elevated from v8086 mode?

asked 2021-07-02 11:00:00 +0000

qstack gravatar image

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answered 2023-03-13 13:00:00 +0000

pufferfish gravatar image

Yes, the processor does push an error code onto the ring0 stack when #GP (general protection fault) is elevated from v8086 mode. The error code is a 16-bit value that provides additional information about the cause of the fault, such as the segment selector index or the type of access that caused the fault. The error code is pushed onto the stack before the processor transfers control to the #GP exception handler in ring0 mode.

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Asked: 2021-07-02 11:00:00 +0000

Seen: 2 times

Last updated: Mar 13 '23